* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

a {
  text-decoration: none;
  color: inherit;
}

:focus {
  outline: none;
}

ol,
li {
  list-style: none;
}

button,
input {
  //字体默认不会继承body，需要写出来
  font: inherit;
}
